Vacuum feed system



G. c. NELsoN VACUUM FEED SYSTEM Filed May 13. 1921 2h00/dar' CF1/95055705 FEED customary heretofore,

Patented ct. 9, 1928.

" UNITED kSTATES PATENT oFFlcE."

GUsTAvE c. NELSON, on MOLINE, ILLINOIS, AssrGN'on V'ro'rnn nonav a BECK coinv PANY, 0F MOLINE, ILLINOIS,k A coRPoRAToN or- ILLINoIs. f

VACUUM FEED SYSTEM.

Application mea may 1a,

f This invention relates to liquid fuel vsystems for explosive engines and it is particularly useful as an accessory to an automobile or truck engine. A i

The primary object of the invention is to provide means of simple and substantial construction, and comprising comparatively few and easily madev parts, for connection withl the fuel supply tank and they intake manifoldof the engine whereby a constant and regular fuel feed` to the engine will always be maintained.

Another` importantobj ect of the invention is to provide for a quick kick-over, which is a term employed in the trade to indicate the change between the vacuum producing position andthe atmospheric pressure position, to, prevent the cut-off from fluttering or floating between positions. Y

Another important object is to provide a much larger feed chamber than has been` and to maintain therein a predetermined reserve supply of fuel gas by means of a small, compact vacuum feed apparatus which operates sensitively and efliciently.

Another objectof the invention is to provide the receiving chamber and feed'chamber in separate tanks so that they can be located in any convenient position and also so that the feed tank can be made in any desired size, shape or form.

Further objects of the invention are to locatethe vacuum connectionand air vent on opposite sides of a rotary cut-olf disk; to connect the receiving chamber with'the feed chamber by any suitable pipe connections depending upon the relative location and arrangement of these chambers and to provide a gravity or other suitable valve therein forY controlling the flow of fuel gas; and to provide for straining the fuel gasV as it passes from the receiving chamber to the feed chamber.

In the accompanying drawings illustrating a selected embodiment of the invention.

F ig. 1 is a vertical sectional view embodying the invention and f y Fig. 2 is a detail sectional view showing another construction of the connection betweenthe two chambers and the valve there- Referring to the drawings the feed chamber 3 is provided in a comparatively small tank et which has a removable head 5 secured 1921. serial No. 469,359.

in place on the tank by a rod 6 which passes through the head and the bottom ofthe tank and is threaded to receive a nut7. A float 8 1s carried by a sleeve 9 which has a free working lit upon the rod 16 and is provided at its upper end with a cut-olf disk 10. This sleeve 9 is preferably continued downbelow the float, as shown at 9.

air vent 15.' These nozzles are located 'one above the other on opposite sides of the disk 10 so that the disk may have a lplay of to v.of an inch, or thereabouts, as

different conditions may makeV desirable. The float and the disk will revolve on the rod and this keeps the disk clean and in perfect, seating condition. Byr locating` the'nozzles in opposition to each other on opposite sides of the disk I overcome any tendency to vdischarge of the fuel gas against the float tends to revolve the float and also tends to hold the float down until the gas level rises so high in the receiving chamber that the float is finally caused torise quickly and make a quick kick-over. n

Ak comparatively large feed chamber 18 is provided in a'tank 19v of any size, shape, or form, and this tank hasan outlet 20 which is-'connected by a pipe (not shown) to theA carburetor in the manner familiar in the art. LA drain plug 2l is also located in the bottom of lthe Afeed tank. An air vent 22 is provided in the top of the feed tank. Itwill be noted that the receiving tank and its various parts are comparatively small in size and this is possible because of the l sensitive loperation of the float krand cut-off chamber may be of any desired size, shape and form and this is a desirable feature of the invention becaus-e it not only provides for the maintenance of a large reserve supply of as in the system but it also enables the feed tank to be made in any desirable size and in a shape to fit in any part of the vehicle.

A connection 23 which may vary accord ing to the different conditions of installations, connects the bottom of the receiving tank 4 with the side of the feed tank 19 and in this connection there is a chamber' 24 and a gravity valve 25 operating therein. Beneath the chamber there is a screen 26 which is held in place by a screw cap 27 and through which the fuel gas must flow from the chamber to the feed tank.

In Fig. 2 I havel shown another form of valve 28 in the connection 29 between the receiving tank and the feed tank, this valve being pivotally mounted at 30 in the con nection and a cap 3l Vbeing provided to enable access to the valve and for cleaning the chamber 32.

-My invention provides an apparatus of 4very simple construction, entirely free fromY delicate and complicated parts which may be made in any size, shape and form for mainf.

taining a steady, constant, gravity fuel reed .to the Carburetor and a reserve fuel supply sufficient for all necessary purposes. If occa-- sion requires the vent pipe 22 can be removed and the feed tank 19 filled through the opening in the top thereof. My system divides the apparatus into two parts which may be separated from each other andY located in different parts of the automobile to accommodate different conditions. The operating part is contained in a receiving tank which may be even smaller than is indicated by the drawing; the delivery part is a supply tank from which the gas is fed by gravity to the carburetor and in which an ample supply of gas is maintained by the operating part, and these parts are connected by a pipe which may be shaped and arranged to suit the particular installation and which is provided with a valve easily accessible without disturbing the operating or delivery parts.

I am aware that changes in the form, construction and arrangement of parts of my invention may be made to suit different installations and to provide for different conditions, without departing from thespirit or sacrificing the advantages of the invention and I reserve the right to make all such changes as fairly fall within the scope of the'following claims.

I claim:

l; In a vacuum feed system, two separate and independent tanks, one having a receivf ing chamber and the other a feed chamber, a vacuum producing connection to the receiving chamber and an air Vent for said chamber, an air vent for the feed chamber, a slidably mounted float operating in said receiving` tank, a cut-off disk vertically move able by said float and operating between the vacuum producing connection and the air vent o-f said receiving chamber to close the same alternately, a pipe connecting the receiving chamber with `the vfeed chamber, a

valve chamber in said pipe and intermediate said tanks, Va valve in said valve chamber,

and a removable screen between the valve vacuum producing connection and the air vent of the receiving chamber to close tlie f same alternately, av pipe connecting the bot-v tom of the receiving chamber with the feed chamber, a valve chamber in said'pipe and intermediate said tanks, a gravity valve in said chamber, a screen in the pipe between the valve chamber and the feed chamber, and a removable cap in the pipe to permit access to said screen. l

In a vacuum feed system, a tank having a receiving chamber, a movable iioat having a convex top and a concavey bottom arranged in said chamber, a cut-off disk rigid with said float, said float and disk' being revoluble in the chamber, a vacuum producing nozzle, and an air vent nozzle for the receiving chamber, said nozzles being located on opposite sides of said disk and vertically and oppositely disposed with reference to each other.

4:. In a vacuum feedsystem, a tank v,having a receiving' chamber, a'vacuum Vproducing ioo nozzle in said chamber, an airvent nozzleY close the vacuum producing nozzle.

5. In a vacuum feed system, a tank having a receiving chamber,'a vacuum produc`-` ing nozzle 'in said chamber, an air vent nozzle in said chamber opposite said vacuum producing nozzle, a vertically movable and revoluble oat having a convex top and a concave bottom arranged in said chamber, a cut-off disk disposed between the nozzles and carried by the float and operated thereby to close the nozzles alternately, said,l

float having a conical top, and a supply inlet to the receiving chamber Varranged to discharge against the conical top of thev nozzle in said chamber opposite said vacuum producing nozzle, means arranged between said nozzles for alternately Vclosinosaid. nozzles, a float having-a convex top and a concave bottom for controlling said means, and a supply inlet discharging against the tcp of said oat to resist the upward movelient thereof, whereby said upward movement will take place suddenly causing a quick operation of said nozzle closing Bleil/IIS.

GUsrAvE c. NELSON. 

